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Structure of the earthLithosphere- The crust and the uppersection of the mantle. It is dividedinto 7 large plates and smaller ones The mantle- -Largely composed ofAsthenosphere- The silicate rock rich in iron andsection of the mantle magnesiumunder the lithosphere. It -Most of the mantle is semi-is formed of molten moltenrock on which the -Temperatures near 5000cplates float -These temperatures create convection currents The core- -Densest part of the planetThe crust- -Made of rocks in Iron and-The thinnest layer which Nickelhas the coolest, least -Outer core is semi-moltendense rocks -Solid inner core over 6000c-Rocks are rich in silicon, -The inner core is about 2.5oxygen, aluminium, km widepotassium and sodium -The outer core is abut-There are 2 crust types 2,200km thick(Oceanic and Continental)…read more